@misc{indiciae7a28e7a8b283,
  title = {Results of spirit leveling in Ohio, 1898 to 1908, inclusive},
  author = {Samuel Stinson Gannett and David Henry Baldwin},
  year = {1909},
  doi = {10.3133/b411},
  url = {https://pubs.usgs.gov/publication/b411},
  note = {Source identifier: b411}
}